PT chance will get a boost if CSJ announced his retirement from politics. There are still voters hesitate to vote any SDP candidate as long as CSJ is there.
Plus the fact 5 years ago Liang Eng Hwa wasn't the incumbent. If he done a good job at local level and can connect with the heartlanders, then it going to be a factor that go against PT.
But at national level, PAP is experiencing a headwind. Very hard to predict here.
Dr. Paul T.,
May the Lord bless you richly today, as you pursue justice with humility, embrace mercy with tenderness, and walk confidently in the balanced grace of God.